Shear mechanism for headers



Sept. 18, 1951 J. H. FRIEDMAN 2,568,433

SHEAR MECHANISM FOR HEADERS Filed March 31, 1945 2 Sheets-Sheet 1 IN VEN TOR. J'OH/V f7- FE/EDNAN A TTOENEYS p 18, 1951 J. H. FRIEDMAN SHEARMECHANISM FOR HEADERS 2 Sheets-Sheet 2 Filed March 51, 1945 2 7 Egg 9 eINVENTOR.

4 48 4 44 47 43 3 JOHN HFE/EDMAN 45 BY r Wm A 7'7'07ENE Y5 PatentedSept. i8,

SHEAR MECHANISM FOR HEADERS John H. Friedman, Tiffin, Ohio,assignortoj'he National Machinery Company, Tiffin, 01110, a

corporation of Ohio Application March 31, 1945, Serial No. 586,001

Claims. 1

This invention relates to shearing mechanism for headers and the like.

The principal object of this invention is to minimize distortion and.breaking of the ends of blanks sheared from elongated wire or rod stock.Another object is to greatly increase the range of lengths within whichsatisfactory blanks may be sheared oil, including all of the usual rangeof blanks several diameters and more in length, down to blanks having alength of but one or less than one diameter. Another object is toprevent the dragging and hence distortion of the end of the shearedblank over the surface of the stock gauge in shearing. Other objects areto facilitate the gauging of the lengths of the blanks to be sheared,and the delivery of the sheared blanks into positions for subsequentupsetting, extruding, piercing or other working operations to form thedesired article; to increase the life of the tools and dies for workingthe sheared blanks; and to increase the accuracy and uniformity of theblanks and articles.

Other and further objects, features and advantages will become apparentas the description proceeds.

The present application is a continuation of my co-pending application,Serial No. 453,985, filed August 7, 1942, which has been abandoned;Serial No. 547,849, filed August 3, 1944; and Serial No. 547,886, filedAugust 3, 1944, on which Patent No. 2,396,995 was granted March 19,1946; the latter application, in turn, being a continuation in part ofmy application, Serial No. 423,900, filed December 22, 1941, which hasbeen abandoned.

In the accompanying drawings:

Fig. 1 is a longitudinal sectional view through the stock feeding anddie stations of a doubleblow cold header arranged in accordance with myinvention;

Fig. 2 is a longitudinal section through the die station showing acut-off blank aligned with the die, and with the header slide advancingupon its first blow;

Fig. 3 is a view similar to Fig. 2, showing the parts as the headerslide continues its movement on the first blow;

Fig. 4 is a view similar to Fig. 2 showing the arrangement of the partsand the blank at the completion of the first blow;

Fig. 5 is a view corresponding to Fig. 3 showing a die for use withrelatively hard or nonductile blanks;

Fig. 6 is a view corresponding to Fig. 4 showing the arrangement of theparts and the blank at the completion of the first blow in a die such asshown in Fig. 5;

Fig. 7 is a fragmentary detailed horizontal section through the stockfeeding station and cutoff arm of an arrangement for use with relativelylong blanks or slugs; and

Fig. 18 is a horizontal section through the die and stock feedingstations of Fig. 7, and showing the punch at the end of the first strokeof the machine.

Like reference characters are utilized throughout the drawing todesignate like parts.

For the sake of illustration, I have shown in Figs. 1 to 4 my shearingmechanism and tools applied to a conventional, double-blow, cold headerof the solid die type. A suitable cold header of this type isillustrated in the patent to Clouse No. 1,932,396 and in my prior PatentNo. 1,955,061. Generally speaking, I provide a machine embodying a bedframe carrying a die, a reciprocating header slide having a pair ofpunches, which are alternately moved into alignment with the die onsuccessive strokes of the slide, means for shearing a blank fromelongated stock and carrying it into alignment with the die prior to theworking stroke of the first punch, and means for ejecting the blank fromthe die after the working stroke of the second punch.

In the accompanying drawings a portion of the bed frame of such amachine is indicated at [0. The frame is provided with a stock feedingtube ll terminating in a shearing edge l2 at the die breast of themachine. A die 13 is carried by the bed frame [0 spaced from the stockfeeding tube II and opens through the die breast of the machine. A knockout rod I4 is arranged to 0perate axially through the die I 3 and, inretracted position, to form the bottom of the die, as illustrated inFig. 1.

A shear arm [5 carrying a shearing bush I6 is arranged to be moved toalign the bush [6 alternately with the stock feeding tube I l and thedie l3. The bush is shaped to closely fit the stock S fed through thetube II and is formed with a shearing edge I! which cooperates with theshearing edge [2, when the shear arm I5 is moved toward the die l3, toshear off the length of the stock contained within the bush [6.

The frame of the machine also carries a stock gauge l8 arranged to limitthe length of stock fed into the shearing bush [6. A plunger I9 isslidably mounted in the shearing bush l6 and is formed with a head 20arranged to :abut the stock gauge [8, as illustrated in Fig. 1. Thuswhen the shearing bush I6 is aligned with the wardly, the advancing endof the stock moves the plunger 19 outwardly until its head 20 strikesthe stock gauge I8, so that a definite length of stock is fed into andenclosed within the shearing bush l6.

The die l3 has a diameter larger than the diameter of the stock S.Preferably, the bottom of the die is formed with a conical or. domeshaped shoulder 2! extending between the side wall of the die and theforward end of the knock out rod [4.

The first punch on the header slide 22 consists merely of an abutmentmember 23 arranged to engage the head 20 on the plunger [9; When theshear arm I moves from the position shown in Fig. ,1 into its alternateposition, with the bush l6 aligned with the die I3, the end' of thestock confined within the bush l6 is sheared oif and carried intoalignment with the die, as illustrated inEigr 2. The header slide 22then advances and the punch 23 engages the head of the plunger [9,thereby forcing. the cut-off length of stock 24, axially out offthe bush5' and into the die l3. 7

Since the diameter of the stock is less than the diameter, of thedie IS;the stock is simply aids in centering the blank and maintaining its.

alignment as the upsetting action begins; Thus as the forward motionofthe header slide '22 continues the cut-off piece 24 is upset smoothly,without buckling or cocking, into a slug.25 substantially fitting theopening of the die 13'.

The length of the cut-01f blank is selected so that when its end engagesthe conical or dome shaped shoulder 2I' and the upsetting action beginsas illustrated in Fig. 3, sufficient length of stock remains within thebush It to insure the correct starting of the upsetting action, while atthe same time the length of the piece confined in the bush i6 isinsufiicient to'cause the metal to .bind in the bush or exert excessivepressure thereon. Preferably the end of the blank leaves the shearingbush 16 as soon as the upsetting has proceededfar enough to insure itsproper completion without further guiding of the end of the blank, sothat when the slug 25 is completed its forward faceis spaced'inwardlyfromthe face of the die l3.

To insure the return of the plunger l9-from its positionwithin theopening of the die H at the end of the first blow, as shown in Fig. 4, aspring 26 is coiled about the plunger 49 between the end, of the bush l6and, the head 20. The extendedlength of the spring is preferably onlysufiicient, to insure the return of the plunger l9' clear of the die to.about the position illustrated in Fig. 3, and does. not return theplunger a distance equal to the, length of the blank, so that the head28 of. the plunger clears the gauge it when theshear' arm returns to theposition shown in Fig. 1; As the header slide 22 recedes afterthecompletion of the first stroke the spring 26 forces the plunger. l9outwardly a sufficient distance to clear thedie opening, after which.

the shear arm 15 returns to the position illustrated in Fig. 1. When theshear bush I6 is again aligned with the feed tube l I, a new length ofstock is fed forwardly until the plunger I9 is forced. outwardly intoengagement with the stock guage l8.

At the completion of the first stroke the blank and the parts of-.themachine are prepared for a second plunger (not shown) in the headerslide 22 to be moved into alignment with the die [3 for carrying out afurther or final operation upon the blank for producing the finishedarticle.

In some-instances it may be desired merely to square up the shearedblank in the first operation, and an; embodiment of the invention forthispurpose is shown in Figs, 5 and t. This arrangement is particularlyuseful in a multiple station transfer header, such as illustrated in thepatent to Clouse No. 2,026,823, or the patent to Prayer No. 2,100,028.

For this.purpose,,.as1shown in .Fig. 5, the die opening 3| is butslightly larger'in diameter than the-aperture. in. thershearing bush [5,which slidably receives the wire or rod-stock from which the piece 32 issheared. The sheared piece 32 is pushed completelyout of the shear bushit into. the die 3| before it contacts thed'ie bottom 2|, which as shownmay be domed to impart a desired contour to the end of the blank. Afterthe piece SZ'has contactedthe bottom of the die, the movement of thepunch 23 continues so as to exert pressure on the piece through theplunger l9 .and upset itinto conformity with the die, forming the blank33 shown in Fig. 6'. By this operation, any irregularity or roughness ofthe shearedends of the blank is corrected, and each blank is accuratelysizedtothe diameter of the die 3] In. the embodiment shown in Figs. 5and 6; as in that shown inFigs. 14, the. spring 26 withdraws the plungerIii from the die. when the header slide carrying the punch 23 recedesandmoves the plunger l9 a-wayfromthe face of the die a distance less thanthe length of the blank being sheared, so that the plunger [9 clearsboth the die opening. and the stock gauge l8 when the sheararm. limovesto-align the shearing bush with the incoming. stock.

Figs; '7 and 8' illustrate an embodiment of the invention in which. nospring is used toretract the plunger. The die and tools shown areparticularly adapted for the'making. of hollow rivets, as disclosed inmy application Serial No. 547,886, filedAugust3,19 i4. x I

As illustrated in .Figs. '7 and 8', such a machine embodies a bed frame3! carrying die and stock feeding stations onwhich there is mounted'areciprocating header slide, adapted to carry a pair of punches; each.of" which is aligned with the die in the bed frame on alternatestrokesof the slide. Such-a machine may be provided in accordance: with myinvention with a cut-off mechanismto cutoff and carry over a new blankafter every other stroke and similarly suitable ejection or knockout.mechanism i provided to eject the fiIllShEdi article from the die afterevery two strokes of the header slide.

In: accordance with this embodimentfof the provided in any suitablemanner with as'maller.

bore 44 opening into an enlargedbore 45; A follower including. a cupportion 46. slidably .fit-

ting in. the bored Slanda sleeve ll-slidably fitting in the bore 44 isarranged to engagethe rear end of the die 42. A spring 48 is positionedin the bore 45 bearing against the cup portion 45 and against a followerplate 49 which is also slidably fitted in the bore 45.

A knockout rod 50 is slidably supported in the frame coaxial with thedie 42 and is provided intermediate its length with a flange 5| slidablybearing in a bore 52 behind and communicating with the bore 45. Ahead ofthe flange 5| the knockout rod includes a length 53 which passes throughcentral apertures in the follower plate 49, the cup 46, and the sleeve41, and enters a bore 54 in the die 42. A relatively small extension 55is carried by the forward end of the knockout rod and slidably fits inthe working bore 56 of the die. The extension 55 terminates in apiercing tool 51.

The forward sliding movement of the die 42 is adjustably limited in anysuitable way, as by an adjustable stop 95 as shown in greater detail inmy copending application, Serial No. 547,886, the stop 95 takes the formof a wedge slidable vertically, perpendicular to the plane of thesection represented by Fig. 8. The wedge 95 is guided in a slot 96 inthe bed frame and has a rearwardly facing wedge surface 9! cooperatingwith wedge surface 98 formed on the die.

With this arrangement the die 42 is normally held pushed forward in itsbore 43 by the tension of the spring 48, with the wedge surfaces 91 and98 in contact, while the die can be forced rearwardly a short distanceby further compression of the spring 48. The spring 48 likewise acts asa return spring for the knock-out rod 50 when the same is advancedsufficiently to cause the flange 5| to engage the follower plate 49 andcompress the spring from the rear end.

Rod or wire stock S is fed to the machine through a feeding aperture inthe bed frame arranged a short distance to one side of the die 42. Thefeeding aperture is provided at its forward face with a shear bush ordie 15 with which cooperates a reciprocating cut-off arm 11. The cut-offarm 11 carries a shearing quill 18 having a central aperture 19 which,in the retracted position of the arm as illustrated in Fig. 7, isaligned with the opening in the bushing 16. A short plunger BI] isslidably mounted in the Opening 19 of the shearing quill. A stock gaugeBI is also aligned with the feed opening in the bushing 16 andisarranged to abut the plunger 80 to limit the length of stock fed intothe shearing quill 18, as shown in Fig. 7.

The face of the quill 18 adjacent the bushing I5 is formed with acutting edge 82 arranged to lie closely adjacent the face of the bushing16. On the opposite side the quill 18 is recessed or relieved asindicated at 83 to insure against interference with the end of the blankwhen the cut-off arm 11 is retracted.

The arm 11 is reciprocated or oscillated in any suitable manner so as tocut off a blank and carry the same into alignment with the aperture 56in the die 42. After a length of stock has been fed into the quill 18until the plunger 80 contracts the stock gauge 8!, as shown in Fig. '7,the cut-off arm 41 is advanced to the position shown in Fig. 8. Theshearing edge 82 severs the wire at the face of the bushing 15 and thequill 18 carries the blank so cut off and the plunger 80 into alignmentwith the opening 56 in the die 42. The cut-off arm is timed to dwell inalignment with the die during the first stroke of the header slide, atwhich time a punch 84 is advanced against the plunger as illustrated inFig. 3. The punch 84 continues to advance and slides the plunger 80through the quill 18 and pushes the cut-off blank into the opening 55 inthe die 42 and against the end of the piercer 51.

The forward end of the piercer 51 is formed with a substantially conicalpoint 85 for engagement with the end of the blank, and. for the greaterpart of its length the piercer is relieved or reduced to a diameter lessthan the maximum diameter of the conical point 85, as indicated at 86.The length of the cut-off blank is so proportioned with respect to theposition of the piercer 51 in the die and the movement of the punch 84that at the end of the forward movement of the punch 84 the cut-offblank is pressed against the conical point 85 of the piercer and.

is upset slightly into full engagement with the wall of the opening 56in the die. Preferably at the completion of this stroke the blankprojects slightly from the face of the die as indicated in Fig. 8. Therecess or relief 83 on the shearing quill I8 is of greater depth thanthe amount which the blank projects from the die at the completion ofthe first blow so that the cut-off arm 1! can be retracted withoutinterference with the blank.

After the completion of the first heading stroke by the punch 84, theheading slide recedes and the cut-off arm is retracted into alignmentwith the shearing bush 16 ready to receive a new length of stock. Thecut-off blank is then in position and the machine is ready to have anydesired operation carried out on the cut-off blank such as a piercingoperation, for example, if a hollow rivet is to be produced from theblank.

I have herein shown and particularly described certain embodiments ofmyinvention and certain methods of operation embraced therein forthepurpose of explaining its principle of operation and showing itsapplication but it will be obvious to those skilled in the art that manymodifications and variations are possible and I am, therefore, to coverall such modifications and variations as fall within the scope of myinvention which is defined in the appended claims.

What is claimed is:

1. In a header having a die cavity, a shear bushing adjacent the diecavity, and a passageway for feeding elongated stock through thebushing; shearing mechanism comprising a movable member carrying a quilladapted to be moved alternately into alignment with said shear bushingand into alignment with said die cavity, said quill having a boreadapted to receive a length of stock fed through said bushing and acutting edge arranged to sever said length of stock and carry the sameinto alignment with said die cavity, a pin slidably mounted in the boreof said quill, and a heading tool arranged to engage said pin to movesaid length of stock out of said quill and into said die said headingtool and pin ejecting said stock completely into said die cavity.

2. In a header having a die, a shear bushing adjacent the die, and apassageway for feeding elongated stock through the bushing; shearingmechanism comprising a movable arm carrying a quill adapted to be movedalternately into alignment with said bushing and into alignment withsaid die, said quill having a bore adapted to receive a length of stockfed through said bushing and a cutting edge arranged to sever saidlength of stock and carry the same into alignment with said die, a pinslidably mounted in the borewofsaid. quill, a stock: gauge;- arranged toengage; said pin. to limit. the length of: stock' fed into: said bore,and a headingtool: arranged to engage said pin: to: move said. length:ofrst'ock' out 'of said'quill and into said dieandmeans in'asaid die to"hold. said length of; stock against. axial motion; said pin in; responseto": pressure: of said heading tool deforming said length" oftstocktinsaid die until substantially the entire length. of stockis in theidie. V

3; In. a header having a 'stockieedingLstatiOn and a die; a shearing;quill: movable between said stock feeding. station andfsaid die; apinslidably mounted-in. said shearing quill and astock gauge spacedfrom: said shearing quill: a: distance: less than the. length of said"pin, said'pinbeing arrangedto engage-said stock gaugesand; the. end

7 of the stock to. limit: the length of'st'ock" which maybefed into saidquill and"a=headingztooliare ranged to engage said 'pin to move-alength. of stock out of said quill and into. said. die, said headingtool and pin ejecting: said stock completely into said die. 7

4. In a header having a. stock. feeding station and a die, a movableshearxmember having'an aperture adapted to be aligned alternatel withsaid stock feeding station and said die, a plunger slidably mountedv inthe aperture in said shear member, a stock gauge aligned withsaid stockfeeding station and arrangedto abut said plunger when stock is 'fed intosaid aperture; saidstocl gauge being. spaced 'from said shear member adistanceless than the length of. said plunger; means-to engage saidplunger whensaid aperture is aligned With said die to move a sheared offlength of stock out of said aperture. and'into said die andspringjmeansurging said plunger into a position in: which said plunger: clears bothsaid die and said stock gauge.

5. In a header having a stock feeding station and a die; a movable sheararmihaving an aperture adapted to be aligned alternately with said stockfeeding station and said'die, aplunger slidably mounted-in theaperture'ini said shear arm, a stock gauge alignedwith-saidstocklfeeding station and arranged to abut said. plunger when.stockis fed into said aperture, saidstock gauge being spaced from saidsheararm adistance less than the length of said plunger,.meansto engagesaid plunger when said apertureis aligned with said die tomovea-shearedJofiil'e'ngth of sto'ck out ofsaidaperture.and'intosaididie and a coiled spring surrounding said: plungerand urging" the sameintoa position in: which:saidplunger'clears bothsaid die and said stock gaugel 6. A header including'ia' framecarrying astock feeding stationanda die, a header'slid-e' reciprocably mounted insaid frame and carrying a punch movabletowardand away fromlsaidfdie, amovable shear arm adapted to be aligned alternately with said stockfeeding station and said die, a plunger slida'bly mounted in theaperture in said shear arm,-a s-tockgauge aligned with said stockfeeding station adapted to abut said plunger to limit the length ofstock fed into said aperture, said punch being arranged to engage saidplunger when said apertureis aligned with said die and push theoppositeendof said plunger and a blank contained in said apertureintosaid die and means acting when said punchrecedes from saiddie-tomove'said plunger out of saiddi-e andproject said plunger .from said'sheararm a distance less than the spacing of said stock gauge fromsaidshear'arm.

7. In'a'machine of theclass'described, adapted for-feeding wire or redstock, adie spacedlfrom the. line oififeed. of saidstock and having.adiameter' substantially greater than the diametenof said stock; shearmeans including a shear bush adapted to be aligned. alternately withsaid die and thelineof' feedof said st0ck',.a plunger'slidably carriedin said shear bush, saidshear: bush beinglarranged: to cut off a pieceof stock: longer than": the: depth of said die and carry the'same andsaidiplunger into axial alignment with said die; and: means arranged toexert pressure on said plunger: to slide' thepiece of stock throughsaid. bush into'contact. with the bottom of said die, and to continuesuchpressure while'the'piece of'stock: is supported by' said bush andthe bottom of said'die to upset the:entire length of. the piece of:stock. 7

8. In a machine of the class described, adapted forfeeding. wire orsrodstock;.'a.die spaced-from arranged to exert pressure on said plunger toslide the piece of stock through said bush into contact With the domeshaped bottom of said die, andto continue such pressurev while the pieceof stockis'supported by said bush and thebottom of said die'to: upsetthe entire length of the piece ofst'ock.

9. A cold header including a frame having a passageway for feeding;elongated stock andcarrying a solid die; a reciprocating headerslide,.and means for cutting off pieces of stockofpredetermined lengthand carrying the same into alignment Wi-th said die,- characterized by.said die having a substantially greater diameter than the diameter ofthe stock and having. a depth less than the length ofthe cut olf pieces.of stock, said means for cutting; ofi pieces ofstock carrying aslidableplunger" engaging an end. of the out ch pieces, and said headerslide being'arranged to engage said plunger to force the cut 7 oilpieces of stock from said. shear means intostoclsfeedingpassageway-having a diameter-sub stantially less than thediameter of said die, shearing meansincluding ashear bush arranged to bealigned alternately with said die and with the line of feed of saidstock, said shear bush being arranged 'to cut off a piece ofstock'longer than thedepth of said-die-and tocarry the same into axialalignment with said die, and said punch beingarranged to slide the pieceof stock from saidshear bush and upset the entire length thereof into"said die,1the outer end of said stock remaining. in engagement with andaligned in said die by said shear bush during a substantial portionbfsaid upsetting operation; 11; A headercomprising a frame havingapessageway for feeding elongated stock and carrying a solid die, aheader slide reciprocably' mounted on said frame and having a punchmovable intermittently into alignment with said die, said stock feedingpassageway having a diameter substantially less than the diameter ofsaid die, shearing means including a shear bush arranged to be alignedalternately with said die and with the line of feed of said stock, aplunger slidably carried in said shear bush, said shear bush beingarranged to cut off a piece of stock longer than the depth of said dieand carrying the same and said plunger into axial alignment with saiddie, and said punch being arranged to engage said plunger to slide thepiece of stock from said shear bush and upset the entire length thereofinto said die.

12. A shearing mechanism comprising a frame having a stock feedingaperture therein, said frame having a fiat surface through which saidaperture passes, a die in said frame, a shear arm carrying a shear bushslidable along said surface between said aperture and said die, saidbush having an aperture therein, opposing edges of the stock feedingaperture and the bush aperture at said surface serving as shearingedges, the surface of said bush at said frame surface on the oppositeside of the bush aperture from the bush shearing edge being recessed tofacilitate retraction of the shear arm after completion of a cuttingoperation, a plunger slidably carried in said shear bush, a stock gaugespaced from said frame surface serving as a stop for said plunger togauge lengths of stock to be cut off, a reciprocably mounted headerslide having a punch intermittently movable toward said bush aperture toengage said plunger and slide the cut off piece of stock from said shearbush and into said die, and means in said die to axially restrain saidpiece of stock, said plunger in response to pressure of said punchdeforming said stock in said die until the outer end of the stock clearssaid bush recess.

13. In a machine of the class described, a station for receiving wire orrod stock fed thereto,

a die spaced from the line of feed of stock and having a diametersubstantially greater than the diameter of said stock, shear meansincluding a shear bush adapted to be aligned alternately with said dieand with the line of feed for said stock, said shear bush being arrangedto cut off a piece of stock at said station longer than the depth ofsaid die and carry the same into axial alignment with said die, and toolmeans arranged to exert pressure on the piece of stock to slide the samethrough said bush into contact with the bottom of said die with theouter end of said stock protruding past the die face and extending intosaid shear bush, said shear bush acting to center the stock in the diewith the side Walls of the stock spaced from the die, said tool meanscontinuing to exert pressure on the stock while the piece of stock issupported by said bush and 10 the bottom of said die to upset the entirelength of the piece of stock.

14. In a machine of the class described, a station for receiving wire orrod stock fed thereto, a die spaced from the line of feed of stock andhaving a diameter substantially greater than the diameter of said stockand a dome-shaped bottom, shear means including a shear bush adapted tobe aligned alternately with said die and with the line of feed for saidstock, said shear bush being arranged to cut off a piece of stock atsaid station longer than the depth of said die and carry the same intoaxial alignment with said die, and tool means arranged to exert pressureon the piece of stock to slide the same through said bush into contactwith the bottom of said die with the outer end of said stock protrudingpast the die face and extending into said shear bush, said shear bushand dome-shaped die bottom acting to center the stock in the die withthe side walls of the stock spaced from the die, said tool meanscontinuing to exert pressure on the stock while the piece of stock issupported by said bush and the bottom of said die to upset the entirelength of the piece of stock.

15. In a machine of the class described, a station having a passagewayfor receiving wire or rod stock fed thereto, a solid die spaced from theline of feed of stock and having a diameter substantially greater thanthe diameter of said stock. means for cutting off lengths of stock andcarrying them into axial alignment with said die, said stock cuttingmeans being arranged to cut oil. pieces of stock longer than the depthof said die and carry the same into axial alignment with said die, andtool means arranged to exert pressure on the piece of stock to slide thesame through said stock cutting means into contact with the bottom ofsaid die with the other end of said stock protruding past the die faceand extending into said stock cutting means, said stock cutting meansacting to center the stock in the die with the side walls of the stockspaced from the die, said tool means continuing to exert pressure on thestock while the piece of stock is supported by said stock cutting meansto upset the length of stock into said die and simultaneously push thestock through said stock cutting means.

JOHN H. FRIEDMAN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 771,752 Stafford Oct. 4, 19042,112,284 Gaess Mar. 29, 1938 FOREIGN PATENTS Number Country Date504,277 Germany Aug. 5, 1930

